January weather forecast
Birigui, Brazil

January, the same as December, is a moderately hot summer month in Birigui, Brazil, with an average temperature fluctuating between 21.3°C (70.3°F) and 29.4°C (84.9°F).

Temperature

The transition into January shows a subtle variation to a moderately hot 29.4°C (84.9°F) from December's 30.1°C (86.2°F) in the average high-temperature. In January, Birigui experiences a temperature dip to an average of 21.3°C (70.3°F) at night.

Heat index

The average heat index in January is evaluated at a very hot 36°C (96.8°F). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', gives an indication of how one might feel in terms of heat after considering humidity. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

The average relative humidity in January is 82%.

Rainfall

The month with the most rainfall is January, when the rain falls for 27.7 days and typically aggregates up to 188mm (7.4") of precipitation.

Daylight

In Birigui, the average length of the day in January is 13h and 16min.
On the first day of January in Birigui, sunrise is at 05:42 and sunset at 19:06. On the last day of the month, sunrise is at 06:02 and sunset at 19:06 -03.

Sunshine

January has the least sunshine of the year, with an average of 7.3h of sunshine.

UV index

January through December, with an average maximum UV index of 6, are months with the highest UV index. The months with the lowest UV index are January through December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.
Note: In January, an average UV index of 6 transforms into the following instructions:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.